I got tired of switching between my firebase browser tab and my app tab to figure out which actions were triggering unexpected fb updates.
By plugging this in, you get something like this:

####Getting started

npm install --save-dev firegrowl

app.configure('development', function(){

firegrowl('<YOUR-FIREBASE-URL>');

});

Note that at the moment, you must disable .read rules in order for this to work. This goes without saying, but don't disable any security rules in production, as this is only intended for use in development

####Options
In theory, you can pass anything into the growl call that you can pass into the node-terminal-notifier npm module.
They aren't all tested; let me know if anything is broken or coule be improved.